Bug 1088817

Created attachment 887104 [details]
dmesg

Already configure the gluster volume to allow connections from unprivileged ports.  From the gluster server, by run:
# gluster volume set gv0 server.allow-insecure on

gluster> volume info
 
Volume Name: gv0
Type: Distribute
Volume ID: 6e6a0709-0dc0-4500-ae55-81bc062c0d6c
Status: Started
Number of Bricks: 1
Transport-type: tcp
Bricks:
Brick1: 10.66.4.217:/home/brick
Options Reconfigured:
server.allow-insecure: on

(In reply to mazhang from comment #0)
> 2. qemu-img segfault
> 

Do you have the backtrace (from the coredump) of this segfault? The call trace below is from the kernel.

> [root@amd-9600b-8-1 ~]# dmesg 
> qemu-img[2086]: segfault at 20 ip 00007f408b3ac0e6 sp 00007fffc6ca9510 error
> 4 in libgfapi.so.0.0.0[7f408b3a0000+16000]
> qemu-img[2202]: segfault at 20 ip 00007f99dc4500e6 sp 00007fffaa6bcfd0 error
> 4 in libgfapi.so.0.0.0[7f99dc444000+16000]
> qemu-img[3178]: segfault at 20 ip 00007f5af33ac0e6 sp 00007fffd266fb50 error
> 4 in libgfapi.so.0.0.0[7f5af33a0000+16000]
> INFO: task qemu-img:2130 blocked for more than 120 seconds.
>       Not tainted 2.6.32-431.17.1.el6.x86_64 #1
> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> qemu-img      D 0000000000000002     0  2130      1 0x00000080
>  ffff88022938fc98 0000000000000082 0000000000000000 ffff88022938fc00
>  ffff88022938fc68 ffffffff810aefd0 0000000000000202 0000000000000000
>  ffff88022938bab8 ffff88022938ffd8 000000000000fbc8 ffff88022938bab8
> Call Trace:
>  [<ffffffff810aefd0>] ? exit_robust_list+0x90/0x160
>  [<ffffffff81076745>] exit_mm+0x95/0x180
>  [<ffffffff81076b8f>] do_exit+0x15f/0x870
>  [<ffffffff810772f8>] do_group_exit+0x58/0xd0
>  [<ffffffff8108cca6>] get_signal_to_deliver+0x1f6/0x460
>  [<ffffffff8100a265>] do_signal+0x75/0x800
>  [<ffffffff810b186b>] ? sys_futex+0x7b/0x170
>  [<ffffffff8100aa80>] do_notify_resume+0x90/0xc0
>  [<ffffffff8100b341>] int_signal+0x12/0x17
> INFO: task qemu-img:2134 blocked for more than 120 seconds.
>       Not tainted 2.6.32-431.17.1.el6.x86_64 #1
> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
>

(gdb) bt full
#0  0x00007f1b64a620e6 in glfs_lseek () from /usr/lib64/libgfapi.so.0
No symbol table info available.
#1  0x00007f1b65e21568 in qemu_gluster_getlength (bs=<value optimized out>) at /usr/src/debug/qemu-kvm-0.12.1.2/block/gluster.c:514
        s = <value optimized out>
        ret = <value optimized out>
#2  0x00007f1b65df489f in refresh_total_sectors (bs=<value optimized out>, hint=<value optimized out>) at /usr/src/debug/qemu-kvm-0.12.1.2/block.c:532
        length = <value optimized out>
        drv = <value optimized out>
#3  0x00007f1b65dfac5f in bdrv_open_common (bs=0x7f1b671f8af0, filename=0x7fff11738776 "gluster://10.66.65.117/gv1/test-718", flags=<value optimized out>, drv=0x7f1b66053200)
    at /usr/src/debug/qemu-kvm-0.12.1.2/block.c:626
        ret = 0
        open_flags = 2
        __PRETTY_FUNCTION__ = "bdrv_open_common"
#4  0x00007f1b65dfadeb in bdrv_file_open (pbs=0x7fff11736c80, filename=0x7fff11738776 "gluster://10.66.65.117/gv1/test-718", flags=2) at /usr/src/debug/qemu-kvm-0.12.1.2/block.c:664
        bs = 0x7f1b671f8af0
        drv = 0x7f1b66053200
        ret = <value optimized out>
#5  0x00007f1b65e1492a in qcow2_create2 (filename=0x7fff11738776 "gluster://10.66.65.117/gv1/test-718", total_size=4096, backing_file=0x0, backing_format=0x0, flags=0, 
    cluster_size=<value optimized out>, prealloc=0, options=0x7f1b671cb570) at /usr/src/debug/qemu-kvm-0.12.1.2/block/qcow2.c:1072
        cluster_bits = 16
        bs = <value optimized out>
        header = {magic = 0, version = 0, backing_file_offset = 219043332111, backing_file_size = 91, cluster_bits = 124, size = 472446402679, crypt_method = 1709013400, l1_size = 
    32539, l1_table_offset = 224, refcount_table_offset = 224, refcount_table_clusters = 1682046592, nb_snapshots = 32539, snapshots_offset = 140733486172022}
        refcount_table = <value optimized out>
        ret = <value optimized out>
        drv = <value optimized out>
        __PRETTY_FUNCTION__ = "qcow2_create2"
#6  0x00007f1b65e14e5f in qcow2_create (filename=0x7fff11738776 "gluster://10.66.65.117/gv1/test-718", options=<value optimized out>)
    at /usr/src/debug/qemu-kvm-0.12.1.2/block/qcow2.c:1214
        backing_file = <value optimized out>
        backing_fmt = <value optimized out>
        sectors = <value optimized out>
        flags = <value optimized out>
        cluster_size = <value optimized out>
        prealloc = <value optimized out>
#7  0x00007f1b65dfb50d in bdrv_img_create (filename=0x7fff11738776 "gluster://10.66.65.117/gv1/test-718", fmt=0x7fff11738770 "qcow2", base_filename=<value optimized out>, base_fmt=
    0x0, options=<value optimized out>, img_size=2097152, flags=64, errp=0x7fff11737018) at /usr/src/debug/qemu-kvm-0.12.1.2/block.c:4678
        param = 0x7f1b671cb4b0
        create_options = 0x7f1b671cb3a0
        backing_fmt = <value optimized out>
        backing_file = <value optimized out>
        bs = 0x0
        drv = 0x7f1b66051740
        proto_drv = <value optimized out>
        backing_drv = 0x0
        ret = <value optimized out>
#8  0x00007f1b65dec365 in img_create (argc=<value optimized out>, argv=0x7fff11737140) at /usr/src/debug/qemu-kvm-0.12.1.2/qemu-img.c:390
        c = <value optimized out>
---Type <return> to continue, or q <return> to quit---
        img_size = <value optimized out>
        fmt = 0x7fff11738770 "qcow2"
        base_fmt = 0x0
        filename = 0x7fff11738776 "gluster://10.66.65.117/gv1/test-718"
        base_filename = 0x0
        options = 0x0
        local_err = 0x0
#9  0x00007f1b640aed1d in __libc_start_main () from /lib64/libc.so.6
No symbol table info available.
#10 0x00007f1b65deb659 in _start ()
No symbol table info available.

I believe this is a libglusterfs issue, rather than a QEMU issue.  Moving to gluster to investigate.

Red Hat Enterprise Linux 6 is in the Production 3 Phase. During the Production 3 Phase, Critical impact Security Advisories (RHSAs) and selected Urgent Priority Bug Fix Advisories (RHBAs) may be released as they become available.

The official life cycle policy can be reviewed here:

http://redhat.com/rhel/lifecycle

This issue does not meet the inclusion criteria for the Production 3 Phase and will be marked as CLOSED/WONTFIX. If this remains a critical requirement, please contact Red Hat Customer Support to request a re-evaluation of the issue, citing a clear business justification. Note that a strong business justification will be required for re-evaluation. Red Hat Customer Support can be contacted via the Red Hat Customer Portal at the following URL:

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